External electronic device

Abstract

A light-transmitting plastic casing and a manufacturing method thereof are provided. A manufacturing method of a light-transmitting plastic casing include the steps: providing a mixed material, the mixed material includes a resinous material, a flame retardant material, a transparent fiberglass material, and an elastomer material; performing a granulating step to the mixed material to form granules; performing a heating step to the granules; and performing a molding step to heated granules to form a light-transmitting plastic casing.

What is claimed is: 
     
         1 . A manufacturing method of a light-transmitting plastic casing, comprising:
 providing a mixed material, the mixed material includes a resinous material, a flame retardant material, a transparent fiberglass material, and an elastomer material;   performing a granulating step to the mixed material to form granules;   performing a heating step to the granules; and   performing a molding step to the heated granules to form the light-transmitting plastic casing.   
     
     
         2 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein a proportion of the transparent fiberglass material in the mixed material is from 7% to 15%. 
     
     
         3 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the flame retardant material includes a silicon based flame retardant and a phosphate ester material. 
     
     
         4 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the resinous material is a polycarbonate (PC) resinous material. 
     
     
         5 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the elastomer material is a polyamide elastomer material. 
     
     
         6 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein a refractive index of the elastomer material is equal to the refractive index of the resinous material, a proportion of the elastomer material in the mixed material is less than a proportion of the transparent fiberglass material in the mixed material. 
     
     
         7 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the mixed material includes an epoxy resin material and a coupling agent to improve rigidity of the light-transmitting plastic casing. 
     
     
         8 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein nitrogen is added in the granulating step to avoid oxidization of the mixed material, and an extrusion temperature at the granulating step is more than 30° C. higher than a melting point of the resinous material. 
     
     
         9 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the granulating step is performed via a double-screw extruder. 
     
     
         10 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the granules are heated at a temperature that ranges from 115° C. to 125° C. for four hours in the heating step. 
     
     
         11 . The manufacturing method of the light-transmitting plastic casing according to  claim 1 , wherein the molding step is an injection molding step. 
     
     
         12 . The light-transmitting plastic casing, made by the manufacturing method of the light-transmitting plastic casing according to  claim 1 .